The announcement was made during a news conference at 4 p.m. Friday at the Scurry County Law Enforcement Center in Snyder. Attending were representatives of the Scurry County Sheriff's Office, the Texas Department of Public Safety, the Texas Rangers and the FBI.

Officials said the investigation into the teen's death is ongoing. They haven't ruled out or identified the case as a homicide.

Also Friday, KTXS News learned there may be an official suspect in the case.

"We have possible suspect information, but at this time, nothing that I can really put out," Colorado City Police Chief Roy Tinker Owens said.

Previously, Shawn Adkins -- who was Hailey Dunn's mother's 25-year-old live-in boyfriend at the time of the child's disappearance -- was identified by authorities as being a "person of interest" in the case.

The remains were sent to the University of North Texas Center for Human Identification for DNA analysis, a news release from the Scurry County Sheriff’s Office said.

In mid-March, DPS, Texas Ranger and FBI investigators spent three and a half days at the crime scene to gather the teen’s scattered remains and any evidence that could lead to a conviction. They were able to identify her through dental records.

Dunn was 13-years-old when her mother, 35-year-old Billie Jean Dunn, reported her missing on Dec. 28, 2010. According to investigators, Adkins quit his job in Snyder the day of the teen’s disappearance and is the last known person to have seen her.

According to Billie and Adkins, Hailey was on her way to a friend’s house across the street from their home in the 1800 block of Chestnut Street when she went missing.

The pair failed polygraph tests when questioned about Hailey, according to an affidavit.

On two occasions, Adkins reportedly walked out of the polygraph examinations he volunteered for. He failed the first phase of his third exam and, during the second phase, indicated Hailey Dunn could be found in Scurry County but refused to complete the exam when more specific questions about her location were asked.

According to the affidavit, investigators used cell phone records to discover Adkins allegedly did not accurately portray his whereabouts the day of Hailey’s whereabouts. Investigators said he visited Colorado City the day she went missing at a time she likely would have been home alone.

Investigators also said they discovered hundreds of articles about mass murderers in Adkins’s and Billie’s bedroom. Billie took responsibility for printing them out.